'''
schoolbag = ['语文书', '数学书', '练习册', '笔盒']
schoolbag1 = schoolbag
print(schoolbag, schoolbag1)
schoolbag[0] = '英语书'
print(schoolbag, schoolbag1)
'''
'''
schoolbag = ['语文书', '数学书', '英语书', '漫画书']
length = len(schoolbag)
i = 0
while i < length:
    print(schoolbag[i])
    i += 1
'''
'''
schoolbag = ['语文书', '数学书', '英语书', '漫画书']
for item in schoolbag:
    print(item)
'''
'''
schoolbag = ['语文书', '数学书', '英语书', '漫画书']
print(schoolbag)
workbook = ['语文练习册', '数学练习册']
penbox = ['铅笔', '油笔', '橡皮']
schoolbag.extend(workbook)
'''
schoolbag = ['语文书', '数学书', '英语书', '漫画书']
print(schoolbag)
schoolbag.pop(2)
print(schoolbag)
schoolbag.remove('漫画书')
print(schoolbag)